Unless Wizards have gotten a Snare, then Druid. Druid Brings Heals, great Dots and Snare. If you include Mercs then you can add 3 Mercs. Combinations 3 Tanks Tank, DPS Melee, DPS Caster 3 DPS Melee 3 DPS Caster Best 2 (3 Tanks), (1 Tanks 2 DPS Caster)
I have a ench/mage/druid combo going atm. I use 3 mercs(1 healer 1 wiz and 1 i switch between a second wiz or healer depending on what i am fighting such as names are just trash). I use the mage air pet for my tanking and it works fine. lots of dps/heals/snare/buffs/cc with this combo. tank merc still can't tank and live as good as a mage pet.
I also have a DRU/ENC/MAG team. Works great. Some nice things about DRU over WIZ: - Cheetah AA: Lasts longer than the recast time, so you can have constant Cheetah speed when running across zones - Druid skin buff adds some nice mana regen, which is helpful for the Mage. - Druid direct DPS isn't as good as Wiz, but the big-hit DS spells add up quite a bit - For tougher named, Druids have some very nice debuffs. - Don't need to use a healer merc (or, what I do, since I like to DPS, Druid is backup healer for healer merc) Tat